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Utek Ut-890A 5Ft 1-Port Usb To Rs-485/422 Serial Converter With Esd ProtectionUT-890A is an universal USB to RS485 RS422 converter. It is compatible with USB and RS485 RS422 standards. UT-890A enables to convert USB signal to RS485 RS422 signal, with internal zero-delay auto receiving and transmitting function. Unique I/O circuit auto control data ..